Nut and bolt lock.



L. P. HANSFORD.

NUT AND BOLT LOOK. IAPPLIGATIONIIILED DEO.18.1908.

937,149. Patented 0@1;.19,1909.

LOT 1?. HANSFORID, OF SALEM, WEST VIRGTNIA.

NUT AND BOLT LOOK."

Specification of Letters Patent.

Patented Oct. 19, 1909.

Application filed. December 18, 1908. Serial No. 468,187.

To all whom it may concern:

Be it known that I, Lo'r P. HANSFORD, a citizen of the United States,residing at Salem, in the county of Harrison and State of West Virginia,have invented a new and useful Nut and Bolt Look, of which the followingis a specification.

This invention relates to that type of nut and bolt locks in which thenut is locked to the bolt by .means of a paWLand-ratchet mechanism, thepawl being carried by the nut, and the bolt having notches which areengageable by the pawl.

The object of the present invention is to provide a nut lock of thiskind which is simple in structure, and efficient in operation, and alsoto provide means for holding the pawl in inoperative position in orderthat the nut may be readily turned off the bolt if desired.

With the foregoing objects in view, the invention consists in the novelconstruction and arrangement of parts to be hereinafter described andclaimed, reference being had to the drawings hereto annexed, in whichFigure 1 is an end view of a bolt and nut, showing the application ofthe invention, the latter being shown locked. Fig. 2 is a similar viewshowing the pawl held in inoperative position. Fig. 3 is a sideelevation of the nut and a portion of the bolt.

In the drawings, 5 denotes the bolt, and 6 is the nut screwed thereon,that portion of the bolt which receives the nut being formed withlongitudinally extending notches 7 which are engageable by a pawlcarried by the nut.

The pawl herein referred to is indicated by the reference numeral 8, itbeing mounted in a recess 9 in the outer face of the nut. Said recesscommunicates with the bolt hole of the nut and the pawl extendstherethrough into position to engage the notches 7. The pawl is a thinstrip of spring metal and is secured to the nut by placing its shank ina slot 8 extending across the outer face of the nut from one sidethereof to the recess 9, a pin 10 passing through the body of the nutand shank within the slot. The normal tendency of the pawl is to move inthe direction of the bolt, by reason of which it will spring into'one ofthe notches when the nut is turned into position to bring said notch,

adjacent to the free end of the pawl. The notches are so shaped that thepawl slips over the same without catching when the nut is being screwedon the bolt.

For holding the pawl 01f the bolt, in order that the nut may be turnedoff, I provide a catch 11 which is a spring strip having at its free enda hook12. The catch is mounted in a slot 11 extending across the face ofthe nut from one side thereof and communicating with the recess 9. Saidslot and the slot 8 extend across the face of the nut from adjoiningsides thereof. The catch extends transversely with respect to the pawl,and its hook 12 is in the path of the free end thereof, so that said endof the pawl may be snapped under the hook, thus holding the pawl awayfrom the bolt, as shown in Fig. 2 of the drawings. hen the pawl is thusheld the nut can be turned off the bolt in the ordinary manner. Thecatch is secured by means of a transverse pin 13 extending through thebody of the nut from one side thereof, and through the catch, the latterseating in a groove 14 extending from one side of the nut to the recess9. Upon disengaging the catch from the pawl, the latter springs backinto position to engage the notches 7 when any one of the same isbrought'adjacent to the free end of the pawl, whereby the nut is lockedon the bolt, and securely held against rotating in a direction to comeoff.

It will be seen from the foregoing that I have provided a nut lock whichis simple in construction, efiicient in operation, and easily applied,and the invention therefore effectually serves the purpose for which itis designed.

What is claimed is:

The combination with a notched bolt, of a nut thereon having a recess inits outer face, and slots extending across said face from adjacent sidesof the nut and communicating with the recess, a pawl secured in one ofthe slots, and having its free end projecting into the recess andengageable with the notches of the bolt, and a catch secured in my own,I have hereto afiixed my signature the other slot, and having its freeend hooki in the presence of two witnesses. shaped and pro'ectin intothe recess, saic T end extending ir ito a? path of the free end LOT HALSFORD' 5 of the pawl, and adapted to engage the same Witnesses:

to hold the pawl in inoperative position. E. H. OAVAN,

In testimony that I claim the foregoing as N. S. LONGABAUGH.

